SR Policy Filtering by Device Identifier for Route Reflectors
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Solution Overview
Problem
Network transmission systems experience reduced efficiency and increased processing load due to the transmission of a large quantity of useless segment routing (SR) policies, particularly when a route reflector sends policies to multiple neighbor devices.
Innovation Solution
Implement policy filtering at network devices using filtering information that includes a policy address family identifier and device identifier to ensure only relevant policies are transmitted, reducing unnecessary policy distribution and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the route reflector sends SR policies to all neighbor network devices, then all devices receive the policies, but network transmission load and processing load increase due to receiving large quantities of useless policies
Solution Approach 1:
The patent applies preliminary action by having the route reflector pre-filter SR policies based on device identifiers before transmission. The route reflector determines whether each policy is relevant to each neighbor device in advance, filtering out useless policies before they enter the network transmission channel, thereby reducing overall network load while ensuring relevant policies are delivered
Solution Approach 2:
The patent extracts only the necessary portion of SR policies (those relevant to each specific neighbor device) from the complete policy set. By using device identifiers to identify and extract only the policies that each neighbor device needs, the system eliminates transmission of unnecessary policies while maintaining complete delivery of relevant policies
2Adaptability or versatility
If the route reflector reflects SR policies to each neighbor network device, then policies are distributed to all devices, but processing load of network devices increases due to handling large quantities of useless policies
Solution Approach 1:
The patent applies local quality by making the policy filtering adaptive to each specific neighbor device's needs. Each device receives a customized subset of policies based on its own device identifier, rather than a uniform complete set. This localizes the policy set to match each device's specific requirements, reducing processing load while maintaining appropriate coverage
Solution Approach 2:
The route reflector performs preliminary filtering based on device identifiers before policies reach neighbor devices. By pre-determining which policies are relevant to each device using their identifiers, the system reduces the processing burden on each device while ensuring they receive all policies they need
Data Source
AI summary
A method includes: When receiving at least one policy, a first network device sends one or more policies in the at least one policy to a second network device based on filtering information. The filtering information includes a policy address family identifier and a device identifier of the second network device.